New photos mark 1st birthday of Britain's Prince Louis

FILE - In this Monday, July 9, 2018 file photo, Kate, Duchess of Cambridge carries Prince Louis as they arrive for his christening service at the Chapel Royal, St James's Palace, London. The youngest child of Prince William and his wife Kate is about to celebrate his first birthday. Prince Louis will mark the milestone Tuesday, April 23, 2019. (Dominic Lipinski/Pool Photo via AP, file)

This photo released by Kensington Palace on Monday April 22, 2019, and taken by Kate, Duchess of Cambridge, shows Prince Louis at their home in Norfolk, England, to mark his first birthday on Tuesday. (Duchess of Cambridge/Kensington Palace via AP)

This photo released by Kensington Palace on Monday April 22, 2019, and taken by Kate, Duchess of Cambridge, shows Prince Louis at their home in Norfolk, England, to mark his first birthday on Tuesday. (Duchess of Cambridge/Kensington Palace via AP)

This photo released by Kensington Palace on Monday April 22, 2019, and taken by Kate, Duchess of Cambridge, shows Prince Louis at their home in Norfolk, England, to mark his first birthday on Tuesday. (Duchess of Cambridge/Kensington Palace via AP)

LONDON — Britain's Prince William and his wife, Kate, have released new photos of their youngest child Prince Louis to celebrate his first birthday.

Prince Louis reached the milestone on Tuesday.

The photos, taken by Kate, show him playing in the garden of the family's home in Norfolk, on England's eastern coast.

Louis is fifth in line to the throne, behind his grandfather, Prince Charles, his father, Prince William, his brother, Prince George, and his sister, Princess Charlotte.

Louis is a great-grandson of Queen Elizabeth II, who turned 93 on Sunday.